Convert barn [b] to varas castellanas cuad Online | Free area Converter

Barn [b]


A barn (b) is a very small unit of area used mainly in nuclear and particle physics to measure the cross-sectional area of atomic nuclei and particles.

1 barn = 10⁻²⁸ square meters (m²).

The name "barn" humorously refers to something “as big as a barn” in the tiny world of atomic scales, despite its extremely small size.


Varas Castellanas Cuadradas


Varas castellanas is an old Spanish unit of length, and varas castellanas cuadradas refers to the corresponding unit of area (square varas castellanas).



  • 1 vara castellana ≈ 0.8359 meters



  • 1 square vara castellana = (0.8359 m)² ≈ 0.6988 m²



This unit was historically used in Spain and Spanish colonies for measuring land and building areas. It is mostly obsolete today but can still appear in old land records.




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